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Part Number: TPS56C215
I used TPS56C215 for supply 0.85v to Xilinx FPGA Zynq Ultrascle+ MPSoC.
I made a supply circuit by referencing "Xilinx-Zynq-US+ Scalable PMIC Power Design"
I want to confirm the question
1. To obtain 0.85V for VCC_12A,
R63 = R62 * (Vout/Vref -1)
where Vout = 0.85V, Vref = 0.6V, R62= 100kΩ
R63 = 100k * (0.85/0.6 -1 ) ≒41.6KΩ
Is that right ?
2. Is Output Capacitance(C58-61) and Inductance (L7) for Vout 0.85V is the same with each value in reference circuit ?
3. May I use VREG5 for VIO which connects PGOOD signal in reference circuit ?
4. For EN signal (BUCK_12A_EN), can I connect to the center tap of the resistor divder between VSYS(5V) and AGND to get over 1.2V
1, For FB resistor, if the Vout is 0.85V, recommend the upper resistor value 10K, and lower resistor value 24K.
2, If the input Vsys is only 5V and I see the mode you select is 1.2M Frequency, if so, the inductor can be lower to 0.33uH or 0.22uH.
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In reply to Yuchang Zhang:
Your answer helps me
Thank you very much,
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